When Kes claims that she can see below the subatomic, Tuvok claims there is nothing below the subatomic. Well, quarks (not the bar) is smaller than subatomic particles in size, and have been well known for a long time. And there are theoretical structures even smaller than that.

Great Moment :

Kes burining up the airponics bay.

Body Count :

One of the security officers is attacked by Susperia; we don't know if he survives, but he may well because the folks in engineering are also attacked and they make it.

Factoid :

Gary Graham, who plays Tanis in this episode, also has a recurring role as Ambassador Soval on Enterprise.

Plotline

Encountering another member of the Caretakers species living in a similar array with some Ocampa, Janeway tries to convince her to return them to the Alpha Quadrant. Meanwhile, the local Ocampa start to teach Kes the full extent of her mental abilities.